KR20080051257A

KR20080051257A - High concentration wastewater treatment system using biological reaction tank and biological filtering tank by natural aeration

Info

Publication number: KR20080051257A
Application number: KR1020060122002A
Authority: KR
Inventors: 양기해
Original assignee: 양기해
Priority date: 2006-12-05
Filing date: 2006-12-05
Publication date: 2008-06-11

Abstract

A high concentration wastewater treatment system using a biofilm reaction tank and a biofilm filtration tank of natural aeration type is provided to remove at least 90% of organic materials and at least 90% of suspended solids in the pretreatment process, remove at least 95% of organic materials and at least 95% of suspended solids in the main treatment process, and remove at least 40% of organic materials and at least 40% of suspended solids in the posttreatment process. A high concentration wastewater treatment system using a biofilm reaction tank and a biofilm filtration tank of natural aeration type comprises: a pretreatment process including a solid-liquid separation process, an anaerobic digestion process, and a dissolved air flotation process; a main treatment process including an oxidation process using a natural aeration type biofilm; and a posttreatment process including a filtration process using a natural aeration type biofilm. The high concentration wastewater treatment system comprises: a catchment tank; a centrifuge into which raw water is flown through a feed pump, and which sends wastewater to the oxidation tank; an oxidation tank from which wastewater is sent to a first anaerobic digester and a second anaerobic digester through a metering pump; a flocculation tank into which wastewater is supplied through a transfer pump; a reaction tank into which wastewater passing through the flocculation tank is supplied, and which sends treated water to the natural aeration type biofilm reaction tank through a dissolved air flotation system; a natural aeration type biofilm reaction tank which recirculates influent through a circulation pump, and transfers treated water to a settling tank through the stabilization tank; a stabilization tank into which treated water passing through respective stages of the reaction tank is supplied; a natural aeration type biofilm filtration tank which filtrates treated water through a filtering pump, and which transfers treated water to a discharge tank.

Description

High Concentration Wastewater Treatment System using Biological Reaction Tank and Biological Filtering Tank by Natural Aeration}

도1은 본 발명의 전체 흐름도1 is a complete flow chart of the present invention

도2은 자연포기형 생물막 반응조와 생물막 여과조의 확대도면2 is an enlarged view of a natural aeration type biofilm reaction tank and a biofilm filtration tank

기존의 폐수처리시스템은 집수로와 폭기조, 반응조와 가압부상조(또는 침전조)로 구성되어 있고 폐수처리 후의 슬러지는 필터 프레스로 압착탈수시켜 왔다. 따라서 고농도 유기성 폐수의 경우 폐수 중 유기물 및 SS의 농도가 매우 높고 염분 함유량에 따른 미생물 대사활동에 악영향을 미치곤 했다. 이로 인해 배출수질의 강화 및 지역민원이 많이 발생하고 있는 상황이다.Existing wastewater treatment system is composed of catchment channel, aeration tank, reaction tank and pressurization tank (or sedimentation tank), and sludge after wastewater treatment has been compressed and dewatered by filter press. Therefore, the high concentration of organic wastewater has a high concentration of organic matter and SS in the wastewater and adversely affect the microbial metabolic activity according to the salt content. As a result, the quality of discharged water and local complaints are increasing.

본 발명은 어렵게 인식되어오던 고염분, 고농도 폐수의 처리를 할 수 있도록 된 폐수처리시스템에 관한 것이다. 이를 위하여 전처리 공정에서는 원폐수 중의 유기물질 및 부유물질 등을 물리, 화학적 방법을 통해 분해제거함으로써 주처리 공정 에서의 오염물질 부하량을 최소화 할 수 있도록 설계되었으며 주처리 공정에서는 잔류오염물질 중 분해제거가 난해한 물질을 생물학적 처리원리에 의해 제거하는 것을 특징으로 한다. 주처리 공정에서 대기로 노출된 생물막에는 다양한 미생물상의 서식으로 인해 최적의 유기물분해환경이 조성된다. 높은 미생물 농도를 유지할 수 있기 때문에 넓은 유입부하량 변동폭에 대한 능동적 대처가 가능하다. 이는 슬러지 발생량 감소 및 반송설비 불필요 등으로 주요 오염물질의 분해제거에 필요한 부대시설의 수량 및 필요전력이 줄어들어 유지관리시 소요되는 에너지를 절약할 수 있다. 또한 생물학적 하수처리시에 절대적으로 필요한 운전인자들이 표준활성슬리지 공법을 위주로 하는 여타의 공법들에 비해 단순화되어 관리시의 전문인력에 의한 인건비 및 점검시간 등이 용이해진다.The present invention relates to a wastewater treatment system capable of treating high salt, high concentration wastewater, which has been difficult to recognize. To this end, the pretreatment process is designed to minimize the load of pollutants in the main treatment process by decomposing and removing organic and suspended substances in the raw waste water through physical and chemical methods. It is characterized by the removal of difficult substances by biological treatment principles. Biofilms exposed to the atmosphere during the main treatment process create an optimal organic decomposition environment due to the diversity of microbial phases. The ability to maintain high microbial concentrations enables active response to large fluctuations in inflow loads. This can reduce the amount of energy required for maintenance by reducing the amount of auxiliary facilities required for the decomposition and removal of major pollutants due to the reduction of sludge generation and the need for a return facility. In addition, operation factors that are absolutely necessary for biological sewage treatment are simplified compared to other methods based on the standard activated sludge method, which facilitates labor costs and inspection time by professional personnel in management.

본 발명은 자연포기형 생물막 반응조와 생물막 여과조를 이용한 고농도 폐수처리시스템으로 크게 전처리 공정과 주처리 공정, 후처리 공정의 3가지 공정으로 나눌 수 있다. 전처리 공정은 고액분리, 혐기소화, 부상분리의 공정으로 구성되어 있고, 주처리 공정은 자연포기형 생물막(14) 이용한 산화 시스템으로 후처리 공정은 안정화, 자연포기형 생물막(14)을 이용한 여과 시스템으로 구성되어 있다. 집수 탱크(1)로 들어온 원폐수는 공급펌프(Pa)를 통해 원심분리기(2)로 보내지며, 원심분리기(2)에서 산화조(3)로 이동하고 정량펌프(Pb)를 통해 1차 혐기소화조(4)로 보내진다. 1차 혐기소화조(4)와 2차 혐기소화조(5)를 지나 이송펌프(Pc)를 통해 응집조(6)로 보내진다. 응집조(6)를 거쳐 반응조(7)로 보내진 처리수는 가압부상조(8) 를 지나 주처리 공정인 자연포기형 생물막 반응조(9)를 단계별로 거친 후 안정조(10)로 보내진다. 자연포기형 생물막 반응조(9)에선 순환펌프(Pg1)을 통하여 유입수의 재순환이 이루어진다. 자연포기형 생물막 반응조(9)에서 처리된 처리수는 안정조(10)를 거쳐 침전조(11)로 이송되며 이후 자연포기형 생물막 여과조(12)에서 여과펌프(Ph)를 통해 여과가 이뤄진 후 최종적으로 방류조(13)로 이송되어 방류된다.The present invention is a high concentration wastewater treatment system using a natural aeration type biofilm reaction tank and a biofilm filtration tank can be largely divided into three processes: pretreatment, main treatment, and posttreatment. The pretreatment process consists of solid-liquid separation, anaerobic digestion and flotation separation.The main treatment process is an oxidation system using natural aeration type biofilm (14), and the post-treatment process is stabilized and a filtration system using natural aeration type biofilm (14). It consists of. The raw wastewater entering the collecting tank (1) is sent to the centrifuge (2) through the feed pump (Pa), and moves from the centrifuge (2) to the oxidizing tank (3) and through the metering pump (Pb) It is sent to the digester (4). Passed through the first anaerobic digestion tank (4) and the second anaerobic digestion tank (5) is sent to the coagulation tank (6) via a transfer pump (Pc). The treated water sent to the reaction tank (7) through the coagulation tank (6) passes through the pressure flotation tank (8) and passes through the natural aeration type biofilm reaction tank (9) which is the main treatment step by step and then is sent to the stabilization tank (10). In the naturally-aerated biofilm reactor (9), the influent is recycled through the circulation pump (Pg1). The treated water treated in the natural aeration type biofilm reaction tank (9) is transferred to the settling tank (11) via a stabilizer tank (10), and then filtered through a filtration pump (Ph) in the natural aeration type biofilm filtration tank (12). It is transferred to the discharge tank 13 to discharge.

본 발명에 따른 자연포기형 생물막 반응조와 생물막 여과조를 이용한 고농도 폐수처리시스템은 고염분, 고농도 유기성 폐수의 처리에 이용할 수 있다. 이는 음식물 쓰레기 침출수와 같은 고농도의 난분해성 유기물 폐수의 처리에 효과적이다. 또한 처리하고자 하는 원폐수의 농도 및 처리조건에 따라 자연포기형 생물막 반응조와 생물막 여과조를 제외한 공정은 첨가 또는 삭제 할 수 있다. 혐기소화조(4,5)에서 나오는 처리가스는 발전소와 같은 시설의 에너지로 이용할 수 있다. The high concentration wastewater treatment system using the natural aeration type biofilm reaction tank and the biofilm filtration tank according to the present invention can be used for the treatment of high salt, high concentration organic wastewater. This is effective for the treatment of high concentrations of hardly degradable organic wastewater such as food waste leachate. In addition, depending on the concentration and processing conditions of the raw waste water to be treated, processes except natural aeration type biofilm reaction tank and biofilm filtration tank may be added or deleted. Process gases from the anaerobic digesters (4,5) can be used as energy for facilities such as power plants.

전처리 공정은 물리,화학적 오염물질 제거공정으로 유입 유기물질의 90%이상, 유입 부유물질의 90% 이상을 제거할 수 있다. 주처리 공정은 생물학적 오염물질 제거공정으로 유입 유기물질의 95% 이상, 유입 부유물질의 95% 이상을 제거할 수 있다. 후처리 공정은 물리, 화학적 오염물질 제거공정으로 유입 유기물질의 40% 이상, 유입 부유물질의 40% 이상을 제거할 수 있다. The pretreatment process is a physical and chemical contaminant removal process that can remove more than 90% of incoming organic material and more than 90% of incoming suspended solids. The main treatment process is a biological contaminant removal process that can remove more than 95% of incoming organic material and more than 95% of incoming suspended solids. The post-treatment process is a physical and chemical contaminant removal process that can remove more than 40% of incoming organic material and more than 40% of incoming suspended solids.

Claims

In the high concentration wastewater treatment system using natural aeration type biofilm reaction tank and biofilm filtration tank, the pretreatment process consists of solid-liquid separation, anaerobic digestion, flotation separation, and the main treatment process is an oxidation system using natural aeration type biofilm. High concentration wastewater treatment system consisting of a filtration system using a stabilized, naturally aerated biofilm.

The high concentration wastewater treatment system according to claim 1, wherein a process except for a natural aeration biofilm reaction tank and a biofilm filtration tank can be deleted or added according to the wastewater to be treated and surrounding conditions.

The high concentration wastewater treatment system according to claim 1, wherein the number of spontaneous aeration biofilm reactors and the number of biofilm filtration tanks can be adjusted according to the wastewater to be treated and facility conditions.